RPGMemes

Dnd5e leaves to many things up to the gm, like magic items and encounter balancing. CR is notoriously inaccurate and running level appropriate fights can easily end up as unwinnable deadly or just a trivial steamroll. Especially once higher lvl magic comes into play with save or suck spells (cough polymorph cough). Yes legendary resistance can fix that, but that is not the system being stable, it is the system giving you tools to fix its unstableness. And even then, the fight ends after X presses of the "I win" button instead of one.

While there are a lot worse systems than dnd5e, when comparing it to pf2e it is objectively the system with more holes. No doubt, partly because pf2e could learn from dnds mistakes and is not produced by a company trying to milk its customers for every cent.